Particle Emitter does not substep if using Geometry Nodes

Is there a way to enable proper sub-stepping for a particle emitter that uses geometry nodes in the modifier stack in blender 5.2+ ?

Example: Proxy (Broken subsampling)

Exact same setup but with actual mesh; no geo nodes in the stack

The proxy version just scales up and translates to modify the simulation

Geo Node Emitter.blend (2.4 MB)